Epithalon vs GHK-Cu
A neutral, side-by-side comparison of two anti-aging & longevity peptides — their mechanisms, dosing ranges, administration routes, side effects, and research evidence. For research and educational purposes only.
Epithalon
Epithalon is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) derived from Epithalamin, a polypeptide extract of the pineal gland. It has been studied since the 1980s by Russian researchers, primarily Vladimir Khavinson, for its ability to activate telomerase and extend telomere length — one of the few compounds with direct evidence of telomere elongation in human cells.
Full profileGHK-Cu
GHK-Cu is a naturally occurring copper peptide found in human plasma, saliva, and urine. It plays a role in wound healing, skin regeneration, and anti-inflammatory signaling. Levels decline significantly with age, which has driven interest in topical and injectable supplementation.
Full profile| Epithalon | GHK-Cu | |
|---|---|---|
| Category | Anti-Aging & Longevity | Anti-Aging & Longevity |
| Also known as | Epitalon, Epithalone, Tetrapeptide Ala-Glu-Asp-Gly | Copper Peptide GHK-Cu, Glycyl-L-histidyl-L-lysine copper, Copper Tripeptide-1 |
| Evidence | Research-stage | Research-stage |
| Dosing range | 5mg–20mg mg, daily for 10–20 day cycles, 1–2x per year | 1mg–3mg mg, daily to every other day (injectable); twice daily (topical) |
| Administration | Subcutaneous injection, Intravenous (clinical studies), Intranasal | Subcutaneous injection, Topical application (cream, serum — most common consumer use), Intradermal injection (skincare clinics) |
| Key side effects | Generally very well-tolerated, Injection site discomfort, Vivid dreams (commonly reported), Improved sleep depth (often reported as benefit) | Injection site redness (transient), Mild skin irritation with topical (typically resolves with reduced frequency), Rarely reported: metallic taste (with injectable use at higher doses) |
| Cited sources | 2 references | 4 references |
Key differences
- Administration: Epithalon — Subcutaneous injection, Intravenous (clinical studies), Intranasal; GHK-Cu — Subcutaneous injection, Topical application (cream, serum — most common consumer use), Intradermal injection (skincare clinics).
- Frequency: Epithalon is typically daily for 10–20 day cycles, 1–2x per year; GHK-Cu is daily to every other day (injectable); twice daily (topical).
- Research depth: this profile cites 2 sources for Epithalon vs 4 for GHK-Cu.
Can you stack Epithalon and GHK-Cu?
compatible: Compatible anti-aging peptides — different mechanisms
Epithalon works epigenetically via telomerase activation; GHK-Cu modulates gene expression through copper-dependent pathways. No known negative interactions. Both are common components of longevity-focused protocols.
See the full compatibility matrixHow each works
Epithalon
Epithalon activates telomerase (hTERT), the enzyme responsible for maintaining telomere length. In vitro and animal studies show telomere elongation, extended cell lifespan, and reduced DNA oxidation. Russian clinical studies in aging populations report improved melatonin rhythms, immune function, and reduced cancer incidence over multi-year follow-up.
GHK-Cu
GHK-Cu has been studied for its ability to stimulate collagen, elastin, and glycosaminoglycan synthesis, promote wound healing, and exhibit antioxidant and anti-inflammatory effects. Gene-expression work by Pickart and colleagues found GHK altered expression (>50% up or down) in roughly 32% of assayed human genes — the basis of the widely-cited '~4,000 genes' figure. Its evidence is strongest for in-vitro and topical/cosmetic use; robust human trials of injectable/systemic GHK-Cu are lacking.
This comparison aggregates public research and structured profile data for informational purposes only. It is not medical advice and does not recommend either compound for human use. Consult a qualified healthcare provider before considering any peptide.